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1. In-situ rheological and structural characterization of milk foams in a commercial foaming device

Author:
Völp, Annika R.; Kagerbauer, Lisa; Engmann, Jan; Gunes, Deniz Z.; Gehin-Delval, Cécile; Willenbacher, Norbert
Source:
Journal of food engineering 2021 v.290 pp. 110150
ISSN:
0260-8774
Subject:
gravity,   etc   ; drainage; foaming; foams; microstructure; milk; models; product development; quality control; reconstituted milk; rheological properties; whipping;     Show all 12 Subjects
Abstract:
... Processing, stability and sensorial perception of food foams are tightly related to their microstructure and flow behavior. Characterization of corresponding physical parameters is central for product development and quality control. An experimental setup enabling in-situ characterization of yield stress, gas volume fraction and bubble size distribution at different heights within a foam column cr ...
DOI:
10.1016/j.jfoodeng.2020.110150

2. The role of the friction coefficients in the granular segregation in small systems

Author:
Song, Xiaohan; Zhang, Guohui
Source:
Powder technology 2020 v.372 pp. 40-47
ISSN:
0032-5910
Subject:
gravity,   etc   ; convection; friction;     Show all 3 Subjects
Abstract:
... With the discrete element method, studies of the influence of friction coefficients on the granular segregation in a 2000 particle system have been performed. Segregation phenomena reported previously such as convection cells [Phys. Rev. Lett. 70, 3728 (1993), Exp. Fluids 51:795–800 (2011)] and intermediate phase [Phys. Rev. E 85, 061302 (2012)] were discovered in our simulations. Higher friction ...
DOI:
10.1016/j.powtec.2020.05.090

3. Magnetically tunable distribution pattern of magnetic particles in a micro-particle sedimentation system

Author:
Cao, Quanliang; Fan, Qi; Chen, Jingge; Ding, Anzi; Li, Haohuan; Han, Xiaotao
Source:
Powder technology 2020 v.370 pp. 147-158
ISSN:
0032-5910
Subject:
gravity,   etc   ; magnetic fields; microparticles;     Show all 3 Subjects
Abstract:
... Transport of particles via magnetic gradient forces has received considerable attention in various fields. However, few studies have paid attention to the influence of magnetic inter-particle forces during transport process on the final particle distribution. To explore this issue, this work constructed a micro-particle sedimentation system dominated by gravity and the magnetic inter-particle forc ...
DOI:
10.1016/j.powtec.2020.05.017

4. A novel and low cost coal separation process: Combination of deep screening classification and gravity separation

Author:
Zhou, Enhui; Yan, Guanghui; Weng, Xingyuan; Zhang, Zhenxing; Zhao, Pengfei; Zhang, Bo
Source:
Powder technology 2020 v.367 pp. 568-575
ISSN:
0032-5910
Subject:
gravity,   etc   ; coal; screening;     Show all 3 Subjects
Abstract:
... A separation process for power coal is proposed here, with the aim of mitigating some of the technical difficulties encountered in the full-size washing and upgrading. To this end, the characteristics of both a 3 mm flip-flow screen and a dense-medium separator were thoroughly investigated. The results showed that reasonable adjustment of the working frequency and tension can significantly improve ...
DOI:
10.1016/j.powtec.2020.03.054

5. Continuum modelling of primary and secondary granular flows in a torsional shear cell

Author:
Zheng, Q.J.; Luo, Q.; Yu, A.B.
Source:
Powder technology 2020 v.361 pp. 10-20
ISSN:
0032-5910
Subject:
gravity,   etc   ; plasticity; theoretical models;     Show all 3 Subjects
Abstract:
... In granular flows, the particles not only move along the principal streamlines but can also circulate perpendicularly to streamlines slowly in a vortex-like manner. Such behaviours have both scientific and practical significances, e.g. in convective mixing of particles, but their mechanisms are still under study. Previous experimental observations have stimulated two explanations for them: centrif ...
DOI:
10.1016/j.powtec.2019.11.035

6. Wireless detector for translational and rotational motion of spherical-particle flow

Author:
Zhu, Y.H.; Yang, H.; Li, R.; Zhang, Y.J.; Chen, Q.; Hua, Y.S.; Sun, Q.C.; Kong, P.
Source:
Powder technology 2020 v.360 pp. 882-889
ISSN:
0032-5910
Subject:
gravity,   etc   ; accelerometers; algorithms; powders;     Show all 4 Subjects
Abstract:
... To measure the translational and rotational motion of spherical particles in a three-dimensional granular flow, a wireless spherical detector with a built-in wireless module and a three-axis gyroscope and three-axis accelerometer was developed. The three-axis acceleration and three-axis angular velocity can be measured and stored by the detector in real time. The attitude angle, the spatial rotati ...
DOI:
10.1016/j.powtec.2019.10.070

7. Evaporation versus imbibition in a porous medium

Author:
Van Engeland, Charlotte; Haut, Benoît; Spreutels, Laurent; Sobac, Benjamin
Source:
Journal of colloid and interface science 2020 v.576 pp. 280-290
ISSN:
0021-9797
Subject:
gravity,   etc   ; evaporation; liquids; porous media; prediction;     Show all 5 Subjects
Abstract:
... Predicting and controlling the liquid dynamics in a porous medium is of large importance in numerous technological and industrial situations. We derive here a general analytical solution for the dynamics of a flat liquid front in a porous medium, considering the combined effects of capillary imbibition, gravity and evaporation. We highlight that the dynamics of the liquid front in the porous mediu ...
DOI:
10.1016/j.jcis.2020.02.105

8. Loss analysis of gravitation vortex type water turbine and influence of flow rate on the turbine’s performance

Author:
Nishi, Yasuyuki; Suzuo, Ryouta; Sukemori, Daichi; Inagaki, Terumi
Source:
Renewable energy 2020 v.155 pp. 1103-1117
ISSN:
0960-1481
Subject:
gravity,   etc   ; friction; overland flow; renewable energy sources;     Show all 4 Subjects
Abstract:
... A gravitation vortex type water turbine is a water turbine that uses gravitational vortices generated upon water draining from a tank bottom and can generate power at low head and low flow rate. In our case, given its operation in a free surface flow field, it is critical to quantitatively understand the performance and hydraulic loss at various flow rates for its design and operation. Accordingly ...
DOI:
10.1016/j.renene.2020.03.186

9. Waiwera: A parallel open-source geothermal flow simulator

Author:
Croucher, Adrian; O’Sullivan, Michael; O’Sullivan, John; Yeh, Angus; Burnell, John; Kissling, Warwick
Source:
Computers & geosciences 2020 v.141 pp. 104529
ISSN:
0098-3004
Subject:
gravity,   etc   ; computer software; models; phase transition;     Show all 4 Subjects
Abstract:
... Waiwera is a new reservoir simulator designed to address the current and future challenges posed by modelling geothermal systems. It incorporates several innovations aimed at improving the robustness of phase transitions and steady-state model convergence, including a modified treatment of the multi-phase gravity term. The Waiwera code is parallelised and makes extensive use of the PETSc scientifi ...
DOI:
10.1016/j.cageo.2020.104529

10. Possibility of non-Fickian mixing at concentration interface between stratified suspensions

Author:
Mori, Masahiro; Tai, Tsubasa; Nishimura, Kosuke; Harada, Shusaku; Yamamoto, Yasufumi
Source:
Journal of colloid and interface science 2020 v.571 pp. 13-20
ISSN:
0021-9797
Subject:
gravity,   etc   ; hydrodynamics; mathematical models; nanoparticles; physical properties;     Show all 5 Subjects
Abstract:
... Relative motion of micro-sized particles suspended in liquid is governed by hydrodynamic effect, in contrast to nano-sized particle suspension in which thermal effect is significant. As a result, the mixing behavior of stratified suspensions with micro-sized particles is totally different from those obeying Fick's diffusion law for nano-sized particles. Such a “non-Fickian” mixing of micro-sized p ...
DOI:
10.1016/j.jcis.2020.03.019

11. Morphological characteristics of gas-liquid interfaces receding through the mesoscopic gap with a sharp feature

Author:
Hu, Liang; Li, Weifeng; Li, Mingbo; Huang, Yao; Fu, Xin
Source:
Colloids and surfaces 2020 v.594 pp. 124629
ISSN:
0927-7757
Subject:
gravity,   etc   ; contact angle; liquids; theoretical models; thermodynamics;     Show all 5 Subjects
Abstract:
... The morphological characteristics of the gas-liquid interfaces receding through the gap with a sharp feature in a quasi-static fashion is investigated in this paper. A series of quasi-static experiments have been performed. A theoretical model that tracks the movement of the gas-liquid interface is developed. Different from previous models, our model is developed on the mesoscopic scale and the pr ...
DOI:
10.1016/j.colsurfa.2020.124629

12. Earthquake-related speleothem damages: observations from the 2008 Mw 7.9 Wenchuan, China

Author:
Zhao, Xue-qin; Wang, Fu-dong; Verheyden, Sophie; Liu-zeng, Jing; Zhang, Gang
Source:
Geomorphology 2020 v.358 pp. 107130
ISSN:
0169-555X
Subject:
gravity,   etc   ; caves; earthquakes; statistical analysis; China;     Show all 5 Subjects
Abstract:
... A speleoseismological study has been conducted at over a dozen cave sites along the Longmen Shan fault zone of the eastern Qinghai-Tibet Plateau. The aim was to assess the damage inflicted on speleothems by the Mw 7.9 Wenchuan earthquake. Results show that the earthquake led to either partial or complete collapse of the caves. ‘Soda straws’ are shown to be particularly vulnerable to earthquake dam ...
DOI:
10.1016/j.geomorph.2020.107130

13. CFD investigation on influence of orifice geometry on micro-scale inclusion movement

Author:
Wang, Qiang; Liu, Yu; Huang, Ao; Yan, Wen; Gu, Huazhi; Li, Guangqiang
Source:
Powder technology 2020 v.367 pp. 358-375
ISSN:
0032-5910
Subject:
gravity,   etc   ; ceramics; geometry; mathematical models; turbulent flow;     Show all 5 Subjects
Abstract:
... In order to understand the influence of the geometry of ceramic filter orifices on the movement of micro-scale inclusions, a transient 3D coupled numerical model has been established. The inclusion trajectory was described using the two-way coupled Euler-Lagrange approach. The gravity, buoyancy, drag, virtual mass, lift, pressure gradient, centrifugal forces, and moment of inertia were taken into ...
DOI:
10.1016/j.powtec.2020.03.060

14. Defying gravity: Drops that climb up a vertical wall of their own accord

Author:
Tadmor, R.; Baksi, A.; Gulec, S.; Jadhav, S.; N'guessan, H.E.; Somasi, V.; Tadmor, M.; Tang, S.; Wasnik, P.; Yadav, S.
Source:
Journal of colloid and interface science 2020 v.562 pp. 608-613
ISSN:
0021-9797
Subject:
gravity,   etc   ; amines; liquids; mica; solutes; surfactants; swimming;     Show all 7 Subjects
Abstract:
... Drops that move uphill on a gradient surface have been introduced in the past. In this paper, however, we present drops that climb a surface that does not have a gradient to begin with. In our study, Octadecylamine in Tetradecane (ODA/TD) drops were placed on either vertical or horizontal mica surfaces, and both the cases show spreading and retraction that initiate the motion of the ODA/TD drops. ...
DOI:
10.1016/j.jcis.2019.10.120

15. Specific gravity of inner and outer beech bark

Author:
Winter, Heiko
Source:
European journal of wood and wood products 2020 v.78 no.2 pp. 413-416
ISSN:
0018-3768
Subject:
specific gravity,   etc   ; Fagus sylvatica; bark; wood;     Show all 4 Subjects
Abstract:
... For beech bark (Fagus sylvatica), specific gravity was measured by means of pycnometer and by water immersion. The pycnometer was suitable for measurement of all analysed sample types. Water immersion method could only be applied to beech wood, whole and inner beech bark. Specific gravities of whole beech bark (0.58 ± 0.04), inner beech bark (0.57 ± 0.05) and outer beech bark (0.75 ± 0.06) differe ...
DOI:
10.1007/s00107-019-01492-x

16. A Numerical Study of Micro-Droplet Spreading Behaviors on Wettability-Confined Tracks Using a Three-Dimensional Phase-Field Lattice Boltzmann Model

Author:
Xu, Da; Ba, Yan; Sun, Jinju; Fu, Xiaojin
Source:
Langmuir 2019 v.36 no.1 pp. 340-353
ISSN:
1520-5827
Subject:
gravity,   etc   ; droplets; models;     Show all 3 Subjects
Abstract:
... Wettability-confined tracks have been extensively used in open-surface microfluidic devices for their high capacity of transporting droplet pumplessly. Inspired by the experimental work of Sen et al. [Langmuir2018, 34, 1899−1907], in the present study, a three-dimensional phase-field lattice Boltzmann model is developed and used to investigate the spreading behaviors of microdroplet on a series of ...
DOI:
10.1021/acs.langmuir.9b02731

17. Stable recurrent calculation of isotropic Gaussian filter coefficients

Author:
Piretzidis, Dimitrios; Sideris, Michael G.
Source:
Computers & geosciences 2019 v.133 pp. 104303
ISSN:
0098-3004
Subject:
gravity,   etc   ; computers; isotropy;     Show all 3 Subjects
Abstract:
... Filtering in the spherical harmonic domain has become a common practice for the post-processing of temporal gravity field solutions derived from the Gravity Recovery and Climate Experiment (GRACE) satellite mission. The most frequently used filtering technique to suppress high-frequency noise in GRACE data is the isotropic Gaussian averaging filter. The implementation of the isotropic Gaussian fil ...
DOI:
10.1016/j.cageo.2019.07.007

18. A Depth-First Search Algorithm for Optimizing the Gravity Pipe Networks Layout

Author:
Rodrigues, Gustavo Paiva Weyne; Costa, Luis Henrique Magalhães; Farias, Guilherme Marques; de Castro, Marco Aurélio Holanda
Source:
Water resources management 2019 v.33 no.13 pp. 4583-4598
ISSN:
0920-4741
Subject:
gravity,   etc   ; algorithms; models; topography;     Show all 4 Subjects
Abstract:
... The layout is displayed in one of the most complex tasks in the gravity pipe network project because there are several factors to consider and often a choice of unassociated or smaller layout. Currently, the designer’s experience is needed so different layout alternatives be analyzed to reduce the depths of the network. Generally, this operation is manual and does not ensure the best result. For t ...
DOI:
10.1007/s11269-019-02373-x

19. Reply to “Comment on ‘Patterns in Drying Drops Dictated by Curvature-Driven Particle Transport’”

Author:
Kumar, P. Logesh; Mondal, Ranajit; Thampi, Sumesh P.; Basavaraj, Madivala G.
Source:
Langmuir 2019 v.35 no.30 pp. 9991-9993
ISSN:
1520-5827
Subject:
gravity,   etc   ; drying; evaporation; sediments;     Show all 4 Subjects
Abstract:
... Hodges and Tangparitkul (Hodges, C. S.; Tangparitkul, S. M. Langmuir 2019, 35, doi: 10.1021/acs.langmuir.9b01442) in their Comment on “Patterns in Drying Drops Dictated by Curvature Driven Particle Transport” argue that the coffee-eye deposits in dried pendant drops can also be formed if the particles or particle clusters in the drying drop are large enough to sediment during the course of evapora ...
DOI:
10.1021/acs.langmuir.9b02139

20. The Influence of Gravity on Contact Angle and Circumference of Sessile and Pendant Drops has a Crucial Historic Aspect

Author:
Gulec, Semih; Yadav, Sakshi; Das, Ratul; Bhave, Vaibhav; Tadmor, Rafael
Source:
Langmuir 2019 v.35 no.16 pp. 5435-5441
ISSN:
1520-5827
Subject:
gravity,   etc   ; contact angle; magnetism;     Show all 3 Subjects
Abstract:
... Normally, pendant drops adapt contact angles that are closer to 90° than their sessile analogues. This is due to the drop’s weight that pulls the pendant drop and straightens its contact angles. In this paper, we show a case in which the opposite happens: sessile drops that adapt contact angles that are closer to 90° than their pendant analogues. To achieve these peculiar states, one needs to incr ...
DOI:
10.1021/acs.langmuir.8b03861